No period after miscarriage

This is my first pregnancy first miscarriage. I am 18 and we found out we were expecting July 2nd. Had spotting very early went to er they said threatened miscarriage. Then 5 days later we saw our babies heart beat. 5 days after that I was in with heavier bleeding and was told my baby no longer had a heartbeat. On July 31, 2018 I passed my angel. I was measuring 6 weeks supposed to be 8 weeks 4 days. I still haven’t had a period and I went from no symptoms to feeling super nauseas and tired again. My bloating went away for maybe 2 days and is back again. I am to scared to take a test because I wanted my baby so badly seeing a negative will make it more real then it already is and if it’s positive and just left over hormones I will be crushed all over again. I have no clue what to do. I just had my 19th birthday 8/19 and got super drunk and had sex. I just don’t know what to do or think. Someone please help know what to do.